If you’ve been using the tub a lot lately oils and soap residue can build up too. Toss in a small dose of enzyme cleaner along with the shock it breaks down gunk that clarifiers can’t. That combo usually does the trick fast.
You can also add a clarifier right after the shock. It helps bind all the fine particles so the filter catches them faster. I did this before a party once and the water looked crystal clear by the evening.
Drop in a double dose of chlorine shock and run the jets for an hour with the cover open. Then clean your filter right after. If the cloudiness is from organic buildup it’ll usually start clearing within a few hours. Just make sure no one gets in until chlorine drops back to normal.